A62B—DEVICES, APPARATUS OR METHODS FOR LIFE-SAVING
A62B18/00—Breathing masks or helmets, e.g. affording protection against chemical agents or for use at high altitudes or incorporating a pump or compressor for reducing the inhalation effort
A62B18/02—Masks
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Respiratory Apparatuses And Protective Means
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Procede de fabrication de masques anti-poussieres et/ou anti-vapeurs notamment, a partir d'au moins une feuille en matiere filtrante et les masques ainsi obtenus